Vibration motor and portable device

Patent metadata

Field	Value
Publication number	US-10536063-B2
Application number	US-201816145133-A
Country	US
Kind code	B2
Filing date	Sep 27, 2018
Priority date	Mar 28, 2016
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

The present invention discloses a vibration motor and a portable device. The motor comprises: a housing, comprising an upper cover and a lower housing connected to each other, an FPCB being inserted in the lower housing, a cavity being arranged inside the housing, and a coil and a vibration system being accommodated in the cavity, wherein the vibration system comprises a vibrator and an elastic support, a magnetic gap is arranged in the vibrator, a first end of the elastic support is connected to the vibrator, and a second end of the elastic support is connected to the housing; and a first end of the coil is fixed at the lower housing, a second end of the coil is inserted in the magnetic gap, and the coil is in signal connection with an external circuit through the FPCB.

First claim

What is claimed is:

1. A vibration motor, comprising:
a housing, comprising an upper cover and a lower housing connected to each other, an FPCB being inserted in the lower housing, a cavity being arranged inside the housing, and a coil and a vibration system being accommodated in the cavity, wherein
the vibration system comprises a vibrator and an elastic support, wherein a magnetic gap is arranged in the vibrator, a first end of the elastic support is connected to the vibrator, and a second end of the elastic support is connected to the housing;
a first end of the coil is fixed at the lower housing;
a second end of the coil is inserted in the magnetic gap;
the coil is in signal connection with an external circuit through the FPCB;
the lower housing is embedded at a portion, opposite the coil and a side wall of the upper cover, of the FPCB to form a U-shaped bending portion;
a through hole is further arranged in the lower housing; and
an end of the bending portion is connected to an inner connecting portion; wherein
the inner connecting portion is located on the upper surface of the lower housing,
an inner welding pad is arranged on the surface, away from the coil, of the inner connecting portion, and
the inner welding pad is opposite the through hole.

2. The vibration motor according to claim 1 , wherein a penetration hole in a thickness direction of the lower housing is arranged therein, and the FPCB is embedded in the penetration hole.

3. The vibration motor according to claim 2 , wherein the FPCB comprises an inner connecting portion connecting the coil, an outer connecting portion connects the external circuit, and a bending portion connects the inner connecting portion and the outer connecting portion, the inner connecting portion or the inner connecting portion and the bending portion is/are embedded in the penetration hole, and the outer connecting portion is arranged on the lower housing outside the cavity.

4. The vibration motor according to claim 1 , wherein the first end of the coil is fixedly connected the FPCB, and the coil is fixed at the lower housing through the FPCB.

5. The vibration motor according to claim 1 , wherein the second end of the elastic support is fixedly connected to the lower housing, and the first end of the elastic support is fixedly connected on a side, near the lower housing, of the vibrator.

6. The vibration motor according to claim 5 , wherein the vibrator comprises a frame, a magnet, and a weight block, the frame comprises a bottom portion, a side wall, and an inner cavity enclosed by the bottom portion and the side wall, the magnet is arranged in the inner cavity, the magnetic gap is arranged between the magnet and the side wall, and the weight block sleeves the outside surface of the side wall.

7. The vibration motor according to claim 6 , wherein the height of the frame in a vibration direction is greater than the thickness of the weight block, an upper cover through hole is arranged in a position, corresponding to the frame, of the upper cover, and an inner diameter size of the upper cover through hole is greater than or equal to an outer diameter size of the frame.

8. The vibration motor according to claim 1 , wherein the second end of the elastic support is fixedly connected to the upper cover, and the first end of the elastic support is fixedly connected on a side, away from the lower housing, of the vibrator.

9. A portable device, wherein the vibration motor according to claim 1 is arranged in the portable device.

Assignees

• Goertek Inc

Inventors

• Zhu Yueguang
• Wang Chao

Classifications

• H02K33/02 Primary

  with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs · CPC title

• G04C3/102

  of the mechanical oscillator or of the coil · CPC title

• H02K5/24

  specially adapted for suppression or reduction of noise or vibrations · CPC title

• H02K5/04

  Casings or enclosures characterised by the shape, form or construction thereof · CPC title

• G04C3/107

  Controlling frequency or amplitude of the oscillating system (circuits G04C3/108) · CPC title